Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so the safety profile is covered. The description goes well beyond that by disclosing 1-hour result caching with <5ms cache hits, per-call pricing, 5 free calls per agent_id, that failed calls are never charged, and that quota exhaustion returns a payment quote rather than a fatal error.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The purpose is front-loaded and the WHEN TO USE / WHEN NOT TO USE structure is helpful, but the economics are stated redundantly: '$0.01 per call', 'first 5 calls free', and the free-trial/payment flow appear in the usage section and again in a separate pricing paragraph with the $2 Stripe link and USDC addresses. That redundancy inflates length without new information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return-value explanation is unnecessary. Given a 3-parameter tool with full schema coverage and rich annotations, the description covers everything an agent needs: scope, exclusions, caching behavior, and the complete payment/retry path including the example invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and each parameter (repo, agent_id, tx_hash) is already documented in the schema, including the owner/name format and the agd_pass_ key pattern. The description's PARAMETER INTERACTIONS section largely restates this (non-empty repo, omit agent_id/tx_hash during trial), adding only marginal emphasis. Baseline 3 applies when the schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb (evaluates) and resource (GitHub repository) plus the exact dimensions analyzed: license risk, maintenance velocity, stars/forks, supply-chain security. It is immediately distinguishable from the only sibling, get_agent_wallet_status, which handles quota/balance rather than repo analysis.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicit WHEN TO USE and WHEN NOT TO USE sections name the condition (deterministic github-audit for a repo), the excluded case (unrelated domains, binary media), and the alternative tool for checking trial quota or balance. Nothing is left to inference.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.